1978 GMC P15 Fluids

Keep Your 1978 GMC P15 in Top Shape with Quality Fluids

When it comes to maintaining or upgrading your 1978 GMC P15, choosing high-quality parts is crucial for ensuring your vehicle stays in top shape, whether you’re tackling a repair or enhancing performance. At Advance Auto Parts, we know how important it is to find the right Fluid for your P15, which is why we carry a wide range of OEM and aftermarket Fluids that are built to last, including Power Steering Fluids Hydraulic Fluids, and more. Whether you’re replacing a damaged Fluid or looking to upgrade, our selection of Fluids for the 1978 GMC P15 ensures you’ll find exactly what you need to keep your vehicle looking and performing its best.

Top-Rated Fluids from Trusted Brands

When it comes to trusted Fluid brands, we’ve got you covered. Our inventory features Fluids from top names like Prestone and Valvoline, and more. For example, Prestone Fluids start at just $9.99 and have an average rating of 4.8 stars, while Valvoline Fluids start at $12.79 with a 4.8 stars rating. With over 634 customer reviews and an overall 5 stars rating for our 1978 GMC P15 Fluids. Check out below the top choices among fellow GMC P15 owners.

Competitive Prices and Extensive Inventory

On average, a Fluid for a 1978 GMC P15 at Advance Auto Parts costs $10.45, with prices ranging from as low as $6.99 to $12.79. We stock 5 Fluids from 2 trusted brands, so you can be confident you’re getting the best options available. Some of our most popular choices for Fluids include Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 32 oz, Power Steering Fluid: All Vehicles, Anti-Wear Protection, 50k miles, 32 oz., and DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart, all starting at just $9.99. These Fluids are designed to fit your P15 perfectly, offering both functionality and style.

Explore Related Parts

And while you’re here, don’t forget to check out related part categories like Coolant/Antifreeze and Transmission Additives to complete your upgrade or repair project. At Advance Auto Parts, we’re proud to offer the parts and expertise to keep your 1978 GMC P15 running smoothly and looking great.

Essential 1978 GMC P15 Fluids

Valvoline – MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.VV324)

MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart

from

$12.79
Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the No. 1 ATF product, suitable for use in 95% of vehicles. And now, it’s recommended for most belt & chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it’s designed to help prevent leaks, reduce wear & tear, and maximize performance. Has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Valv MaxLife Multi-Vehicle ATF is suitable for most Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW & Audi vehicles. Recommended for use in: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC; Honda/Acura ATF-Z1 and Honda CVT; Nissan/Infiniti Matic-D, Matic-J, Matic-K and Matic-S; Hyundai/Kia SP-II, SP-III, SP-IV and SPH-IV; BMW 7045E, ETL 8072B, LA2634 and LT71141; Allison C-4; Mercedes-Benz NAG-1; Volvo 1161521, 1161540, 97340 and 1273.41; Subaru ATF HP, Lineartronic chain CVT and CVT-II, Lineartronic High Torque CVT, and CV-30; and VW/Audi G-052-025-A2 and G-052-162-A1. CURRENTLY UNABLE TO SHIP THIS PRODUCT TO CUSTOMERS LOCATED IN CALIFORNIA

Product Features:
  • FOR USE IN 95% OF VEHICLES INCLUDING MOST CVTs in operation with US registered light duty applications
  • HIGH PERFORMANCE CONDITIONING AGENTS prolong seal elasticity to prevent leaks
  • IMPROVED DURABILITY & TRANSMISSION LIFE with anti-wear technology to avoid costly repairs
  • ENHANCED HIGH & LOW TEMP PERFORMANCE supports transmission fluid in all weather situations
See More

Valvoline – DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart (Part No.798153)

DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart

from

$11.99
Valvoline DEX/MERC ATF is a high-quality transmission fluid formulated to meet the challenging demands of many automatic transmissions. Its responsive low-temperature fluidity is beneficial in both electronic and hydraulic controlled transmissions and transaxles. Recommended for use in the following applications: MERCON*, DEXRON*-III, Ford M2C138-CJ and M2C166-H, Allison C-4 and TES-389, and Caterpillar TO-2.

Product Features:
  • Formulated with premium base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
  • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
  • Developed with anti-wear technology to help improve transmission durability
  • Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
See More

Prestone – Power Steering Fluid: All Vehicles, Anti-Wear Protection, 50k miles, 32 oz. (Part No.AS261Y/1)

Power Steering Fluid: All Vehicles, Anti-Wear Protection, 50k miles, 32 oz.

from

$9.99
Prestone® Power Steering Fluid (PSF) delivers increased system life. Designed with Anti-wear System Protection, Prestone PSF protects against pump failure, squeals and clogs. This 50,000 mile fluid life is formulated for use in all manufacturers; cars, SUVs, crossovers, and light and medium duty trucks. This a conventional fluid. Many cars 2006 and newer use synthetic based fluids for longer life and better protection. Conventional and synthetic fluids can be mixed but performance and replacement intervals are reduced by the conventional fluid.

Product Features:
  • 50,000 Mile Fluid Life
  • Anti-Wear Protection = Increased System Life. Protects against pump failure, squeals and clogs. Corrosion protection for metals, rubber & gasket components.
  • For use in all manufacturers
  • Conventional Formula – For use in all manufacturers
See More

Prestone – Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 12 oz (Part No.AS262)

Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 12 oz

from

$6.99
Prestone® Power Steering Fluid + Stop Leak (PSF+SL) delivers increased system life and prevents & stops system leaks. Stop Leak additives renew, restore and condition seals in the power steering system. These seals harden and shrink over time which are the likely cause of leaks. The stop leak additives also prevent leaks by rejuvenating seals before they leak. Also designed with Anti-wear System Protection, Prestone PSF+SL protects against pump failure, squeals and clogs. This 50,000 mile fluid life is formulated for use in all manufacturers; cars, SUVs, crossovers, and light and medium duty trucks. This a conventional fluid. Many cars 2006 and newer use synthetic based fluids for longer life and better protection. Conventional and synthetic fluids can be mixed but performance and replacement intervals are reduced by the conventional fluid.

Product Features:
  • 50,000 Mile Fluid Life
  • Includes Stop Leak Additives to prevent and stop power steering system leaks.
  • Anti-Wear Protection = Increased System Life. Protects against pump failure, squeals and clogs. Corrosion protection for metals, rubber & gasket components.
  • Conventional Formula – For use in all manufacturers
See More

Prestone – Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 32 oz (Part No.AS263Y)

Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 32 oz

from

$10.49
Prestone® Power Steering Fluid + Stop Leak (PSF+SL) delivers increased system life and prevents & stops system leaks. Stop Leak additives renew, restore and condition seals in the power steering system. These seals harden and shrink over time which are the likely cause of leaks. The stop leak additives also prevent leaks by rejuvenating seals before they leak. Also designed with Anti-wear System Protection, Prestone PSF+SL protects against pump failure, squeals and clogs. This 50,000 mile fluid life is formulated for use in all manufacturers; cars, SUVs, crossovers, and light and medium duty trucks. This a conventional fluid. Many cars 2006 and newer use synthetic based fluids for longer life and better protection. Conventional and synthetic fluids can be mixed but performance and replacement intervals are reduced by the conventional fluid.

Product Features:
  • 50,000 Mile Fluid Life
  • Includes Stop Leak Additives to prevent and stop power steering system leaks.
  • Anti-Wear Protection = Increased System Life. Protects against pump failure, squeals and clogs. Corrosion protection for metals, rubber & gasket components.
  • Conventional Formula – For use in all manufacturers
See More

Most Popular Power Steering Fluids for 1978 GMC P15s

Enhance your 1978 GMC P15 with one of the 3 Power Steering Fluids we have in stock, starting at just $6.99.

Prestone – Power Steering Fluid: All Vehicles, Anti-Wear Protection, 50k miles, 32 oz. (Part No.AS261Y/1)

Power Steering Fluid: All Vehicles, Anti-Wear Protection, 50k miles, 32 oz.

from

$9.99
Prestone® Power Steering Fluid (PSF) delivers increased system life. Designed with Anti-wear System Protection, Prestone PSF protects against pump failure, squeals and clogs. This 50,000 mile fluid life is formulated for use in all manufacturers; cars, SUVs, crossovers, and light and medium duty trucks. This a conventional fluid. Many cars 2006 and newer use synthetic based fluids for longer life and better protection. Conventional and synthetic fluids can be mixed but performance and replacement intervals are reduced by the conventional fluid.

Product Features:
  • 50,000 Mile Fluid Life
  • Anti-Wear Protection = Increased System Life. Protects against pump failure, squeals and clogs. Corrosion protection for metals, rubber & gasket components.
  • For use in all manufacturers
  • Conventional Formula – For use in all manufacturers
See More

Prestone – Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 32 oz (Part No.AS263Y)

Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 32 oz

from

$10.49
Prestone® Power Steering Fluid + Stop Leak (PSF+SL) delivers increased system life and prevents & stops system leaks. Stop Leak additives renew, restore and condition seals in the power steering system. These seals harden and shrink over time which are the likely cause of leaks. The stop leak additives also prevent leaks by rejuvenating seals before they leak. Also designed with Anti-wear System Protection, Prestone PSF+SL protects against pump failure, squeals and clogs. This 50,000 mile fluid life is formulated for use in all manufacturers; cars, SUVs, crossovers, and light and medium duty trucks. This a conventional fluid. Many cars 2006 and newer use synthetic based fluids for longer life and better protection. Conventional and synthetic fluids can be mixed but performance and replacement intervals are reduced by the conventional fluid.

Product Features:
  • 50,000 Mile Fluid Life
  • Includes Stop Leak Additives to prevent and stop power steering system leaks.
  • Anti-Wear Protection = Increased System Life. Protects against pump failure, squeals and clogs. Corrosion protection for metals, rubber & gasket components.
  • Conventional Formula – For use in all manufacturers
See More

Prestone – Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 12 oz (Part No.AS262)

Power Steering Fluid: All Vehicles, With Stop Leak, Restores & Conditions Seals, 50k miles, 12 oz

from

$6.99
Prestone® Power Steering Fluid + Stop Leak (PSF+SL) delivers increased system life and prevents & stops system leaks. Stop Leak additives renew, restore and condition seals in the power steering system. These seals harden and shrink over time which are the likely cause of leaks. The stop leak additives also prevent leaks by rejuvenating seals before they leak. Also designed with Anti-wear System Protection, Prestone PSF+SL protects against pump failure, squeals and clogs. This 50,000 mile fluid life is formulated for use in all manufacturers; cars, SUVs, crossovers, and light and medium duty trucks. This a conventional fluid. Many cars 2006 and newer use synthetic based fluids for longer life and better protection. Conventional and synthetic fluids can be mixed but performance and replacement intervals are reduced by the conventional fluid.

Product Features:
  • 50,000 Mile Fluid Life
  • Includes Stop Leak Additives to prevent and stop power steering system leaks.
  • Anti-Wear Protection = Increased System Life. Protects against pump failure, squeals and clogs. Corrosion protection for metals, rubber & gasket components.
  • Conventional Formula – For use in all manufacturers
See More

Best-Selling 1978 GMC P15 Hydraulic Fluids

Upgrade your P15 with one of our 2 best-selling Hydraulic Fluids, earning an average 5 stars rating across 446 reviews.

Valvoline – MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.VV324)

MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart

from

$12.79
Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the No. 1 ATF product, suitable for use in 95% of vehicles. And now, it’s recommended for most belt & chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it’s designed to help prevent leaks, reduce wear & tear, and maximize performance. Has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Valv MaxLife Multi-Vehicle ATF is suitable for most Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW & Audi vehicles. Recommended for use in: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC; Honda/Acura ATF-Z1 and Honda CVT; Nissan/Infiniti Matic-D, Matic-J, Matic-K and Matic-S; Hyundai/Kia SP-II, SP-III, SP-IV and SPH-IV; BMW 7045E, ETL 8072B, LA2634 and LT71141; Allison C-4; Mercedes-Benz NAG-1; Volvo 1161521, 1161540, 97340 and 1273.41; Subaru ATF HP, Lineartronic chain CVT and CVT-II, Lineartronic High Torque CVT, and CV-30; and VW/Audi G-052-025-A2 and G-052-162-A1. CURRENTLY UNABLE TO SHIP THIS PRODUCT TO CUSTOMERS LOCATED IN CALIFORNIA

Product Features:
  • FOR USE IN 95% OF VEHICLES INCLUDING MOST CVTs in operation with US registered light duty applications
  • HIGH PERFORMANCE CONDITIONING AGENTS prolong seal elasticity to prevent leaks
  • IMPROVED DURABILITY & TRANSMISSION LIFE with anti-wear technology to avoid costly repairs
  • ENHANCED HIGH & LOW TEMP PERFORMANCE supports transmission fluid in all weather situations
See More

Valvoline – DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart (Part No.798153)

DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart

from

$11.99
Valvoline DEX/MERC ATF is a high-quality transmission fluid formulated to meet the challenging demands of many automatic transmissions. Its responsive low-temperature fluidity is beneficial in both electronic and hydraulic controlled transmissions and transaxles. Recommended for use in the following applications: MERCON*, DEXRON*-III, Ford M2C138-CJ and M2C166-H, Allison C-4 and TES-389, and Caterpillar TO-2.

Product Features:
  • Formulated with premium base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
  • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
  • Developed with anti-wear technology to help improve transmission durability
  • Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
See More

Top-Rated Fluid Brands For Your 1978 GMC P15

When it comes to finding the perfect Fluid for your 1978 GMC P15, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 2 trusted brands. We carry the most popular Fluid brands including Prestone and Valvoline, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $9.99. Purchasing a Fluid from us here at Advance Auto Parts is a smart move for both you and your 1978 GMC P15, providing peace of mind with parts that meet or exceed OEM standards.

Popular Prestone 1978 GMC P15 Fluids

If you’re looking for a top-quality Fluid for your 1978 GMC P15, Advance Auto Parts has exactly what you need with our selection of Prestone Fluids. We have 2 Prestone Fluids in stock for this fitment, all known for their durability and precision fit. With prices starting at just $9.99 and an average cost of $10.24, you’ll find the perfect Fluid for your needs and budget. Prestone Fluids for the 1978 GMC P15 come highly rated, with over 188 customer reviews and an impressive average rating of 4.8 stars. Choosing a Prestone Fluid from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

Top-Quality Valvoline 1978 GMC P15 Fluids

For those in search of a high-quality Fluid for their 1978 GMC P15, Advance Auto Parts offers a great selection of Valvoline Fluids. With 1 Valvoline Fluids in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Fluids start at just $12.79, giving you a range of options to suit your budget. Backed by over 446 customer ratings and an average rating of 4.8 stars, Valvoline Fluids provide both reliability and excellent performance. Choosing a Valvoline Fluid from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

FAQs for 1978 GMC P15 Fluids

What are the best-selling Fluids for 1978 GMC P15s?

What’s the price range for 1978 GMC P15 Fluids?

The prices of Fluids for the 1978 GMC P15 range from $6.99 up to $12.79 for the most premium parts.

What is the average price of a Fluids Fluid for a 1978 GMC P15?

The average price for Fluids for the 1978 GMC P15 is $10.45. Keep in mind the variety of part types within our Fluid category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Fluids for other GMC P15 model years?

Yes, we carry Fluids for 3 model years of GMC P15s between 1975 and 1977. The following model years are the most popular for Fluid purchases: 1977, 1976, and 1975.

Does Advance Auto Parts sell Fluids for any other 1978 GMC models?

Yes. We stock Fluids for 13 other popular 1978 GMC models. Some of the most popular are 1978 Jimmy Fluids, 1978 Caballero Fluids, 1978 K25 Fluids, 1978 K15 Fluids, and 1978 G25 Fluids.

What are the top-rated Fluids that fit the 1978 GMC P15?

Based on 634 reviews by customers, our 1978 GMC P15 Fluids have an average customer rating of 5 stars. These are the highest-rated categories of Fluids for the 1978 GMC P15 and their top-rated products:

What types of Fluids do you sell for my 1978 GMC P15?

As of 2/5/25, these are some of the most in-demand types of Fluids for a 1978 GMC P15:

Can I get help with 1978 GMC P15 Fluid orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Fluids and more.

What is your return policy for GMC P15 Fluids?

Advance Auto Parts keeps returns simple. For new GMC P15 Fluids and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.